var xmlhttp;

function changeModel(make){
    try {
        if (window.XMLHttpRequest)
        {// code for IE7+, Firefox, Chrome, Opera, Safari
            xmlhttp=new XMLHttpRequest();
        }
        else
        {// code for IE6, IE5
            xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
        }

        xmlhttp.open("POST","findmark.jsp?req="+make,true);
        xmlhttp.send();
        xmlhttp.onreadystatechange=function()
        {
            if (xmlhttp.readyState==4 && xmlhttp.status==200)
            {
                document.getElementById("model").innerHTML=xmlhttp.responseText;
            }
        }
    } catch (ex) {
        alert(ex);
    }
}
